Wave beam mattress



FIG. 1 shows a perspective view;

FIG. 2 shows a top view;

FIG. 3 shows a front view;

FIG. 4 shows a bottom view;

FIG. 5 shows a back view;

FIG. 6 shows a right view; and,

FIG. 7 shows a left view. 

The ornamental design for a wave beam mattress, as shown and described. 